Electric heating device.



G. AALBORG. ELEGTEIO HEATING DEVICE., APPLICATION FILED JUNE 8, 1907.

912,985. Patented Feb. 23,1909.

3 SHEETS-SHEET l.

'a In. un le? I WITNESSES 3 SHEETS-SHEET 2.

C. AALBORG.

ELECTRIC HEATING DEVICE. APPLICATION FILED JUNE 8,1907.'

Patented Feb. 23, 1909.

3 SHEETS-SHEET s.

ATTO RN EY UNITED STATES ATN CHRISTIAN AALBORG, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WES'IINGHOUSE ELECTRIC L lilANUlAGT URING COMPANY, A CORPORATION Ol" PENNSYLVANIA ELECTRIC HE ATING DE VICE.

Specification or" Letters Patent.

Patented Feb. 23, 1909.

Application filed June 8, 1907. Serial No. 377,929.

My invention relates to electric heating devices and it has tor its object to provide a simple, durable and e'ective device t'or heating Water and generating steam for various purposes` lVhcn electric and steam locomotives are employed interchangeably for hauling trains 'of steam heated passenger cars it is necessary to provide a suitable device with which the electric locomotive may be equipped tor supplying steam to its train of vehicles in cold Weather.

According to my present invention, I provide a steam generator that requires little or no attention from the locomotive driver and may receive its energy, in the form of electric current, from the source which supplies the locomotive driving motors.

Figure l, ot the accompanying drawings, is a sectional elevation ot' a portion of an electric heating boiler constructed in accordance with my invention. Fig. 2 is a tube packing detail which' may be employed in lieu of that shown in Fig. l. Fig. 3 is a sectional vieiv on the lline IIIWIII of Fig. I and in a plane at substantially right angles to this figure and Fig. et is a view, partially in section but mainly in elevation, of the assembled boiler. Iiig. 5 is a sectional view ot a modiied form oit' heating device in which a` single tube employed.

Referring to Figs. l, 2, 3, and l of the drawings, the device here illustrated co1nprises a. plurality of Huid-containing tubes l divided into two groups, each of which is supported at its ends by substantially cylin drical blocks 2 of insulating material, such as soapstone, through which holes 3 are bored to. provide outlets for the tubes. I'lhe insulating blocks Q are jn'ovidedivith annular flanges l and their extremities extend into suitable recesses '5 in a .pair of heads or end chambers t5, with which the tubes l are adapted qto communicate. The Walls of the recesses 5 are counter-bored to forni shoulders 7, and suitable packing rings S encirclel the insulating blocks 2 and are interposed between the shoulders i' and the annular projections l. Each annular projection l is clamped between the adjacent ring 8 and the inwardly extending iiange 9 ot a clamping ring l0, the latter being adjustably secured to the head or end chamber i3 by means oit' bolts ll, and packing rings l2 being intel# pc, .fd between thc projection and the flange. bteam tight joints are thus formed between the insulating blocks'and the end chambers. Short metal sleeves I3 are pressed onto the tubes l at a short distance from their efe tremities and the holes in the insulating blocks 2 are counter-bored to receive the sleeves, steam-packing washers la being in terposed between the shoulders '15, formed by the counter-bores, and the sleeve 13. It may be desirable 'to provide a metal sleeve lla as shown in liig. 2 in order to relieve the insulating blocks 2 from the strains produced by the expansion ol the packing. it

'the other ends of metal sleeves 13 Washers 16 are fitted over the tubes l and insulating blocks 17, having holes IS through which the tubes extend, are pressed against the washers 16 by clamping rings 19 .similar to the clamping rings l0 and secured thereto by means of bolts 20, compressible Washers 2l being interposed between the rings 19 and the insulating blocks 1T.

Although Figs. l and 8 illustrate only one end 'of my improved heating device, both ends are substantially alike, as the outline of Fig. 4f indicates, and each set of tubes is preferably surrounded by a heat-insulating sleeve 22, and is supplied with electric cur rent through terminals Q3 and connectors 2l.

A circuit is established from one terminal, which is attached to one of the tubes ynear an insulatingring 1T, along the ltube to vthe insulating ring at the opposite end, thence, through a connector, to another tube, and so on through the several tubes of the boiler.

It will be readily understood that the cir-- cuit connections of the tubes may be varied materially Within the scope of my invention and that they are determined bythe length of the tubes and the material of which they are constructed. The heads or end chambers 6 are each provided with taps to which :t

inlet and outlet pipes may be connected.

The heating-insulating sleeves 22 may preferably 'be protected by means of sheet rent passing through them at the same time,

and enters the opposite end chamber in the form of steam.- Steam may be maintained in this head or end chamber under considerable pressure if suiiicient electrical energy is supplied tothe tubes and if the water in the opposite end chamber is maintained under pressure.

Reference may now be had to Fig. 5 in which a single tube 29 replaces the tubes l,

of the other figures and a chamber 30 corresponds to the pressure heads 6, a special tap 31 being rovided for establishing a communication etween the two parts. This tap comprises a stuffing box 32 which projects from the walls of the chamber with which it communicates and isprovided with an insulating sleeve 33 having an end flange or collar 34:, the outer extremity of the stuiiing box being counter-bored to freceive this liange or collar. A second insulating sleeve 35, having an end iange 36, is secured to the stuing box'by a bushmg 37 which is fitted over the tube and engages the flange 36 and is screw-threaded into the outer extremity of the stuing box. A short length of pipe 38 for connecting the stu'ing box to the tube 29, extends throughthe sleeve 35 and enters f the 4sleeve 33 for 'a short distance. Suitable steam-packing is introduced into thestuing box`around the pipe 38 and between the ends of the insulating tubes.

Since modifications in the size and arrangement of details may be effected within the scope of my invention, I desire that only such limitations be imposed as are indicated in the appendedclaims.

I claim as my invention:

l. In an electric heating device, the combination with aplurality ofl current-conducting luid-containing tubes and an insulating block in which the tubes are seated at each 'end of the device, of Huid-pressure heads or chambers which communicate with the tubes and make tight joints with the insulating blocks.

2. In an electric heating device, the com-V bination with current conducting tubes and end members of electric-insulating and heatresisting material, of pressure heads or' chambers with which the tubes communicate, and means for providing a steam tight joint between the end members and the chamber each ofwhich has an openlng 'in one wall,

Huid-containing tubes communlcating with said chambers, and insulating blocks seated in said openings and provided with holes to receive the ends of the tubes, of means for electrically connecting the tubes in a predetermined relation. j

5. In an electric heating device, the combination with a pair of liuid-pressure chambers, each having a plurality .of openings, and groups of fluid-containing tubes communicating therewith, of blocks or heads having holes to receive the tubes and constructed of electric-insulating and' heat-resisting ma-y terial, and means for securing the blocks or heads in the openings inthe chambers.

(i.v In an electric heating device, the combination with a pair of fluid-pressure chambers, each having a plurality of openings and groups of fluid-containing tubes communicating therewith, of soapstone blocks or heads having holes to receive the tubes andl means for securing the blocks ror heads to the chambers. Y

In testimony whereof, I have hereunto subscribed my name this 29th day'of May,

' CHRISTIAN AALBOlitGr:l Witnesses:

J. R'. SPURRIER, BIRNEY HINES. 

